• BOSCH 0392023509 Auxiliary Water Pump
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BOSCH

BOSCH 0392023509 Auxiliary Water Pump

BOSCH 0392023509 Auxiliary Water Pump

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✔ BOSCH 0392023509 Electric Auxiliary Engine Water Pump — Genuine OE Quality
✔ Fitment: Select BMW and MINI models with B38, B46, B48, B58, and S55 engines
✔ Direct replacement for factory auxiliary water pump — no modifications required
✔ Manufactured to OE specifications — ensures reliable coolant circulation
✔ 12V Electric Pump — 650 l/h flow rate, 0.1 bar pressure
✔ Genuine Bosch quality — trusted OEM supplier to BMW/MINI

 

BOSCH 0392023509 Auxiliary Water Pump — for BMW and MINI Models

Engine overheating, intermittent cooling issues, or excessive noise from the auxiliary water pump area — these are common signs that your auxiliary water pump may be failing. The auxiliary water pump is an electric pump that circulates coolant to critical components such as the turbocharger(s) and heating system, especially during engine shut-off or low-speed operation . A failing pump can cause downstream components to overheat and fail, leading to costly repairs. Replacing it with this genuine Bosch pump restores proper coolant circulation and protects your engine.

This is an OEM-quality Bosch auxiliary water pump (part number 0392023509). It is a 12V electric pump with a flow rate of 650 l/h and a pressure of 0.1 bar . The pump is designed for vehicles with electric coolant pump systems and does not include a mounting bracket (sold separately where required) . This is the same quality part used as original equipment by BMW and MINI.

 

When to Replace

• Engine overheating or intermittent cooling issues
• Excessive noise from the auxiliary water pump area
• Coolant leaks around the pump
• Error codes related to the auxiliary cooling system
• Turbocharger or heating system performance issues

Product Details & Highlights

• ✔ Genuine Bosch OEM — not an aftermarket or Chinese replica
• ✔ Reliable coolant circulation — ensures proper cooling during engine shut-off and low-speed operation • ✔ 12V electric operation — 650 l/h flow rate, 0.1 bar pressure • ✔ Direct replacement — fits factory mounting location
• ✔ Backed by Bosch's manufacturer warranty

Package Contents

• 1 × BOSCH 0392023509 auxiliary water pump

FAQ

FAQ

Is this a genuine Bosch part or a copy?
This is 100% genuine Bosch OEM — in original factory packaging with Bosch part number printed on the label. It is not an aftermarket brand or a replica.

Does this fit my 2018 BMW 340i?
Yes — the 2018 340i with the B58 engine uses this auxiliary water pump. We recommend verifying with your VIN .

Does this fit my 2019 MINI Cooper S?
Yes — the MINI Cooper S (F56) with the B48 engine uses this pump. Please verify with your VIN .

Does this pump come with a mounting bracket?
No — this pump is supplied without the mounting bracket. The original bracket is typically reused during installation .

Does this pump come with a gasket?
No — the necessary gasket or seal is not included and must be purchased separately if required .

Can I install this pump myself?
Yes — it is a direct replacement. However, we recommend consulting your vehicle's service manual for the correct installation procedure and torque specifications.

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